Preheat oven to 375°F.,______,In a large bowl, cream together oil and sugar. Stir in applesauce, eggs, orange juice and vanilla.,In a second large bowl, whisk together flour, baking powder, zest and salt. Stir flour mixture into oil-egg mixture until just combined. Gently stir in blueberries.,Spoon batter into muffin cups and bake until a toothpick inserted in the center of a muffin comes out clean. Cook about 30 minutes for large muffins and 12 minutes for mini muffins! Enjoy.